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Patented Aug. 18, 1891.

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Patented Aug. 18, 1891.

(No Model.)

. P. F. WHITE.

VARIABLE EXHAUST MBOHANISM FOR LOGOMOTIVES.

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TME 1W frutas c UNITED STATES PATENT OFFICE.

PATRICK F. NVHITE, OF IVESTERNPORT, MARYLAND, ASSIGNOR OF ONF.-` HALFlTO JACOB S. .IAMESSON AND WILLIAM F. MANSFIELD, OF SAME PLACE.

VARIABLE EXHAUST MECHANISM FOR LOCOIVIOTIVES.I

SPECIFICATION forming part of Letters Patent No. 457,930, dated August18, 1891.

Application iiled May 14, 1891. Serial No. 392.688. (No model.)

.To @ZZ whom it may concern:

Be it known that I, PATRICK F. WHITE, residing at Westernport, in thecounty of Alleghany and State of Maryland, have invented certain new anduseful Improvements in Variable Exhaust Mechanisms for Locomotives andSimilar Engines, of which the following is a specification, referencebeing had therein to the accompanying drawings.

This invention relates to exhaust mechanisms for steam-engines,especially locomotiveengines.

The object of the invention is to give a smooth and uniform draftthrough the lues of a boiler by causing the steam to enter thesmoke-stack in an annular film; also, to make the draft adjustable;also, to generally improve the construction of the exhaust mechanism.

Figure 1 is a central vertical section through the smoke-stack of alocomotive-boiler having double nozzle. Fig. 2 is a broken detail ofpart of the adjusting mechanism near the top of the stack. Fig. 3 isaplan of the stack and mechanism near the top thereof. Fig. 4 is avertical central section of the device applied to a singleexhaust-nozzle engine. Fig. 5 is a detail of a construction referred toherein. Fig. 6 is a perspective of a lever mechanism which may be usedto lift the adjustable cone.

A indicates the smoke-box of a locomotive or similar boiler.

B B, Fig. l, denote exhaust-nozzles from the cylinders of the engine, ofany usual construction.

O denotes a hollow cone which is applied above the upturned end of theexhaust-nozzles B for the purpose of bringing the steamjets through thepipes B B to a central position. The hollow cone C may well bepermanently attached to the exhaust-pipes B and must be firmly held. Theupper end of cone O is extended in form of a cylinder C. A cylinder Dslides over the same and is v ertically adjustable thereon, as by meansof straps c d, attached to the part-s, and held in longitudinal relationby set-screws e. The upper end f cylinder D is expanded and continued 5oas a hollow conical or funnel-shaped conveyer F., with its larger endupward, and the upper end of this funnel E has acylinder E', extendingupward and preferably integral therewith. The upper end of the ring E isalittle below the base of the smoke-stack when in normal position, butmay be raised or lowered by means of set-screws e.

A conical piece, plug, or valveF issuspended just above the hollow coneE. This plug tapers less than the inside of hollow cone or funnel E, asshown, and is a little less in diameter than the interior of the hollowcone E. As the plug F may be adj usted vertically within limits, it willwhen down nearly close the top of cone E, but will leave an annularspace between the outside of the plug and the inside of the hollow cone,which space will be increased or diminished in area as plug F is raisedor lowered. The upper end of plug F is cylindrical for the same purposeas the upper end of hollow cone E-namely, to deliect the steamstraightup, and not out toward the sides of the stack.

The plug F is preferably hung on a tube or support G, which is securedthereto by a screw, pin, or in other suitable manner. Thesupporting-tube Gis guided in bearings in pieces H H. The bars H Hextend across the smoke stack and have holes through which the support Gpasses, so as to be vertically adjustable. The upper end of tube Gpasses through a bar I, which crosses the smoke-stack at the top and isadjustable vertically to raise or lower tube G and plug F.

Bar I and bars H I-I are as narrow as consistent with strength, and maybe mere blades with their edges turned up and down, so as not toobstruct the stack unnecessarily. Bar I extends outside the stack at itsends and has rods K K iirmly attached, which rods extend down parallelwith the sides of the smokestack. The rods K K are guided in supports orbearings L L on the stack, and when lifted vertically will lift the barI and its tube G j and plug F, thus enlarging the space between plug Fand hollow cone E.

Light springs M surround the rods K and rest on bearing-brackets L. Theupper ends of these springs bear upward on collars O, which are held tothe rods by set-screws or in other IOO suitable manner. The tendency ofthese springs is to lift the rods K, and thus lift the plug; but as allthe parts are held by connection to the cab the result is merely tolighten the parts until the connections to the cab are released, whensprings M will tend to lift plug F through the connections described.

The passage through plug F may be closed at the bottom by a valve P,preferably a double cone, which is attached to a light rod Q. A spring Rsurrounds the upper end of rod Q and tends to lift it; but the rod isheld down by a cage S, which is attached to the fixed cross-bar I-l. Theconical form of the valve causes it to center itself in the plug. Asthis valve controls the passage through the plug, it is not material tothis part of the invention which of the parts is made to move to openthe passage through the plug.

When the bar I and tube G are raised, the rod Q is held down by cage S.Thus the lifting of rods K K not only lifts the bar I and the tube G andplug F, opening a wider annular passage around the plug F and permittinga freer upward passage of steam through said annular openings, but asthe rod Q is held from rising by cage or basket S the spring R iscompressed and the valve I is left below the main body of the plug F,thus opening a passage through the pipe G, through which steam may pass.In other words, the raising of plug F enlarges the outer passage andopens an inner passage from the hollow conical chamber E.

It is not essential to the operation of my device that the valve l?should be movable, as very goed results will follow from the use of asolid plug, as indicated in Fig. 5, in which case the tube G may besimply a rod. Such may be made by fixing valve P to the plugin anysuitable way. rIhe mechanism by which the rods K may be raised is notmaterial. Any good mechanic can devise mechanism for the purpose. Adevice which will answer is shown in diagram in Fig. 6, in which frepresents a rock-shaft suitably supported in bearings on the smoke'-stack U. A crank-arm g, rigid with the shaft, is connected by a draw-bar72, with the cab. Arms /L' Q', rigid with the rock-shaft, are pivotallyconnected to the bottom of rods K K. A pull on the rod h will rock theshaft f, and thus swing arms 't' and lift rods K K.

If desirable, the cross-bar I can be bent, as shown in Figs. 4 and G, sothat the upper end of tube or connection G may be within the upper endof the stack when the plug F is raised.

The cylindrical rim on the upper edge of the hollow conical conveyer Eand the corresponding cylindrical portion of plug F are considereddesirable features; also the dierent inclination of the plug and thehollow conveyer by which the body of steam is gradually gathered into anannular film and directed perpendicularly upward parallel with the wallsof a cylindrical stack. Itis not,however, essential that a cylindricalstack be used.

I do not desire to limit myself to the precise construct-ion shown, asmany modifications `may be made in construction without departing fromthe general principles of my invention.

Vhat I claim isl. The combination, with the exhaust of a locomotive ofthe character described, of a conical conveyer above the exhaust, havingits larger end upward, and a conical plug of less diameter than theconical conveyer, said plug adjustable in the mouth of the conveyer by asupport connected to the stack above and outside said conveyer,substantially as described.

2. The combination, with the double exhaust-pipes, of a conical tubeabove the same, having its smaller end upward, a second hollow conicalconveyer arranged in reverse direction, and a conical plug above theconveyer and adjustable by a support above and outside the conveyer.

3. The combination, with the exhaust-pipes B B, of the hollow cone Cabove the same, and the reversed cone E above the latter and adjustablerelatively thereto, substantially as described.

et. The combination, with the'exhaust, of the hollow conical conveyerpipe having a cylindrical vertical portion at its upper end, and theconical plug having a cylindrical portion at its upper end and arrangedsubstantially within the hollow cone and vertically adjustable thereon,substantially as described.

5. The combination, with the exhaust and the hollow conical conveyer, ofthe conical plu gvertically adj ustable within the conveyer, said Vplugbeing a cone of different taper from that of the conveyer, so as tochange the area of the annular opening between the plug and conveyer,substantially as described.

6. The combination, with the exhaust and the conical conveyer within thesmoke-box and below the stack of the locomotive-boiler, of the conicalplug within the conveyer, a support extending from said plug to the topof the stack, and means for lifting or lowering said plug, extending tothe vicinity of the cab, substantially as described.

7. The combination of the exhaust, the hollow conical conveyer having avertical cylindrical upper portion, and the conical plug verticallyadjustable within the conveyer and having a vertical cylindrical upperportion, substantially as described.

8. The combination, with the exhaust and conical conveyer above thesame, of the conical plug having a passage therethrough, and a valvecontrolling said passage, substantially as described.

9. The combination of the exhaust, the conical conveyer, and a conicalplug adjustable within said conveyer, of a tube leading through saidplug and substantially to the top of the IIO IIS

stack, and a valve controlling the passage through said tube.

10. The exhaust, the hollow conical conveyer, and the conical plug,arranged substantially as described, the passage extending through saidplug, the valve arranged at the bottom ot' said passage, and a rodsupporting said valve which passes through the tube, substantially asdescribed.

11. The combination of the conical con` ported on a stem passing throughthe tube; all in combination, substantially as described.

13. The combination, with the exhaust, conical conveyer, and conicalplug substantially within the saine, of the plug-supporting devices andmeans for lifting the same, and springs bearing on said supportingdevices to hold the same' against rattle and looseness, substantially asdescribed.

14. The combination, with the exhaust and conical conveyer, of theconical plug supported practically within said conveyer and having apassage therethrough, and a valve controlling said passage,substantially as described. A

In testimony whereof I aix my signature in presence of two witnesses.

PATRICK F. WHITE. Witnesses:

W. A. BARTLETT, PHILIP MAURO.

